Deck: Expired / Rules of the Road

1. A A rapid ringing of a bell for 5 seconds every two minutes
2. B A whistle signal of one short, one prolonged, and one short blast
3. C A rapid ringing of a bell for 5 seconds, preceded and followed by three separate and distinct strokes on the bell
4. D A prolonged blast of the whistle at intervals not to exceed one minute

Tip: press A-D to answer